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[Reddit] RX 480 fails PCI-E specification - Page 8  

post #71 of 1129
I currently have a asus p8z68-v/gen3 motherboard. It's by no means cheap, but it is getting on in years. Should I be concerned about it crapping out on me with my 480? I'm gonna be super bummed if I end up returning my card for an AIB (I don't plan on overclocking, just holding out until Vega)
post #72 of 1129
So add an 8 pin and change the bios on new cards?
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post #73 of 1129
Quote:
Originally Posted by jmcosta View Post

its fine going above the power connector limit but not the pci and that is the issue here.
i think its better to hold a week to get a premium card, you will be able to pump more juice for that oc at decent fan noise.

yes it is the pci slot that is in question. however looking at the source article from THG:
Quote:
With peaks of up to 155W, we have to be thankful they're brief, and not putting the motherboard in any immediate danger. However, the audio subsystems on cheaper platforms will have a hard time dealing with them. This means that the "you can hear what you see" effect will be in full force during load changes; activities like scrolling may very well result in audible artifacts.

they didn't seem to pull any alarms over it as some are doing here. don't forget for those around during the PCI-E 2.0 spec discussion, there was talk about increasing the power along with the bandwidth to 150 watts per slot. meaning each of the 5 12v traces would need to carry ~2.5 amps each; twice as much as a little fan header but definitely doable.

however i'm sure PSU manufactures could have put the kibosh on that since it would increase the 12v load in the 24 pin ATX connector; given most mobos have more than one x16 slot and already running HD and fan motors.
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post #74 of 1129
I had a feeling this might be the case when those OC results started coming in. Virtually everyone was reporting a steep drop from stable to BSOD's and extreme artifacting, which points to insufficient power delivery.

Sucks for AMD. Hopefully the AIB's were already designing 8-pin versions for the enthusiast market.
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post #75 of 1129
Quote:
Originally Posted by dmasteR View Post

Here's one off the bat.

http://www.hardware.fr/articles/951-9/consommation-efficacite-energetique.html

RX 480 comes with a 6 pins PCIE and most of the power drain is shared between the 6 pins and the PCI Express port (sometime more on the latter). The cards does go way over the specs which is 5.5A. In Battlefield 4, we are getting 6.92A and 7.10A with OC (called "Uber" mode in the review). Witcher 3 goes even higher with 7.79A. This stress is not expected on all motherboards.


EDIT: If you take a look at the graph, you'll see in Witcher it actually pulls near 200W in Uber Mode.

Thank you! After reading and translating the review a few things are made clear.

The uber mode is the boost clocks (1266 mhz) and not an overclock per se. Not good then, since it does draws more than what the pcie standard calls for.

Second, there could be a possibility that your mobos pcie could get fried if it's not a nice mobo. Hmmm...

I'm assuming the AIBs will have more sense and use 2 x 6 pins or at least an 8 pin to mitigate this. I guess we'll have to wait for those.

I wonder what AMD will do to sort out the reference design? Send out new drivers that lower performance to hit the pcie specs? This will probably affect those buyers that are budget conscious and will buy the reference over spending more... Hopefully they fix it since AMD needs to do good in this segment.
Edited by mark_thaddeus - 6/29/16 at 8:48pm
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post #76 of 1129
Quote:
EDIT: UPDATE FROM AMD:

1) The RX 480 has passed PCIe compliance testing with PCI-SIG. This is not just our internal testing. I think that should be made very clear. Obviously there are a few GPUs exhibiting anomalous behavior, and we've been in touch with these reviewers for a few days to better understand their test configurations to see how this could be possible.

2) Update #2 maybe the OP is confused. There is a difference between ASIC power, which is what ONLY THE GPU CONSUMES (110W), and total graphics power (TGP), which is what the entire graphics card uses (150W). There has been no change in the spec, so I would ask that incorrect information stop being disseminated as "fact."

We will have more on this topic soon as we investigate, but it's worth reminding people that only a very small number of hundreds of RX 480 reviews worldwide encountered this issue. Clearly that makes it aberrant, rather than the rule, and we're working to get that number down to zero.
post #77 of 1129
There is no real issue with this, other than an issue of arbitrarily meeting specs, which seems a bit odd to complain about in 2016, since said specs have been violated by the majority of GPUs for the last 10 years.

Just more sensationalist clickbait and fearmongering.
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post #78 of 1129
Quote:
Originally Posted by Zero4549 View Post

There is no real issue with this, other than an issue of arbitrarily meeting specs,

....

Just more sensationalist clickbait and fearmongering.

Electric capacity specs aren't arbitrary.

You're crazy and lazy.
post #79 of 1129
I bought one as soon as they were available on NewEgg. I'm 100% not worried about this at all. It'll pass, and people will come up with something else to attack. 1 or 2 reviews does not a problem make. Relax.
post #80 of 1129

295x2 draw 500W on 2x8 pin and nothing happened.So ?

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